At times when users try to add calendar data into Microsoft Outlook, they face an error message of outlook coudn’t import calendar, which comes when you are importing your ICS file. This issue can damage the meeting schedules and workflow of users who depend on Outlook for planning.

In this guide, we will explore why this issue occurs, using every possible solution to fix it through the steps provided. Here we will include 5 ideal ways that will solve these issues and ease your workflow.

Why does Outlook Show the Calendar Import Error?

Nowadays, the couldn’nt import calendar error occurs due to compatibility and issues related to the files. Here are some of the common reasons:

• When the file is corrupted or incomplete.

• The calendar file contains excess event details.

• There are network or server synchronization problems

•  When the issue is with Outlook or Microsoft 365 service.

Finding the cause of this error will help you to find the correct solution to solve it without repeating the icalendar imports that fail. Now lets start with the solution to fix this problem.

Method 1: Check the ICS File for Corruption or Format Issues

There is one reason behind this calendar import failure which is a damaged ICS file and to check the file, this method will help you. The steps to use are given below:

1. First, you need to open the ICS file in a text editor such as Notepad.

2. Then, make sure that the file starts with BEGIN: VCALENDAR and ends with END: VCALENDAR.

3. Now, remove any extra spaces, broken lines, or unreadable characters.

4. Finally, save the file and try importing it again in Outlook.

Method 2: Import the Calendar Using Outlook Desktop App

Sometimes, the error occurs due to limitations in Outlook Web. This solution resolves the issue such as outlook couldn't import calendar through the given steps:

1. Open Microsoft Outlook on your computer.

2. Now go to the file and click on the Open & Export button.

3. From that, choose the Import/ Export option

4. Now, select the import an iCalendar or vCalendar file.

5. Browse and select your calendar file

6. At last, choose whether you want to open it as a new calendar or import it into the previous one.

Method 3: Re-sync the Calendar Through a Temporary Calendar Account

This method bypasses direct import issues and can fix cases where Outlook repeatedly shows outlook couldn’t import calendar  try again later. The steps are given below:

1. Import the ICS file into Google Calendar or Apple Calendar.

2. Ensure the calendar syncs correctly.

3. Add the same account to Outlook.

4. Let Outlook sync the calendar automatically.

Method 4: Verify the Outlook and Microsoft 365 Service Status

If the issue was server-related, the error message may disappear without any file changes. Temporary service disruptions can also trigger import errors. The steps are given below:

1. Check the Microsoft 365 Service Health Dashboard.

2. Ensure Outlook services are running normally.

3. Restart Outlook and try importing again after some time.

Method 5: Fix the Issue of Outlook Couldn't Import Calendar Through Automated Solution

When manual methods fail, or the calendar file is too large, an automated solution is often the safest choice. The SysTools ICS Splitter Tool is designed to handle complex and oversized ICS files efficiently. Also, this utility will help you remove the problem of outlook couldn't import calendar by reducing the size of the file. To use this tool, the steps are given below:

1. Download and install the software in your operating system

2. Then, click on the split ICS file option from the tab

3. After, this choose the destination to save the output file.

4. Then, select the filters of splitting, like size, counts, etc

5. Finally, start the splitting process and view the result report

Best Practices to Prevent Calendar Import Errors

• Users should always export calendars in smaller chunks.

• Use the latest Outlook version for importing ICS files.

• Always avoid editing ICS files unless it is necessary.

• Always keep a backup of original calendar data

• Test imports in a secondary Outlook profile

Conclusion

In this article, you have learned 5 different methods of resolving outlook couldn't import calendar try again later error. Also, we have discussed the reasons why this problem arises, and the best practises to avoid this error to occur. For complex situations involving large or multiple calendars, automated solutions like the above mentioned tool offer a reliable and efficient alternative